{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "patch vulnerability", "arguments": ["patch number", "patch", "issues addressed", "vulnerability", "supported platform", "vulnerable system version", "vulnerable system", "releaser", "time"]}], "input": "In January and February , Redmond emitted fixes for Windows 7 and Server 2008 R2 machines to counter the Meltdown chip - level vulnerability in modern Intel x64 processors ."}
{"patch vulnerability": [{"patch number": "NAN", "patch": "fixes", "issues addressed": "NAN", "vulnerability": "NAN", "supported platform": "NAN", "vulnerable system version": "NAN", "vulnerable system": ["machines", "Server 2008 R2", "Windows 7"], "releaser": "Redmond", "time": ["February", "January"]}]}